| 摘要 |
In one embodiment a spray apparatus includes a nozzle assembly (12) containing six nozzles (14) coupled to a high pressure water feed line (16) and one or more chemical nozzles (20) coupled to chemical feed lines (18). The apparatus includes first and second rotators (22, 32) for rotating the nozzle assembly about generally perpendicular first and second axii (30, 36) through ranges of rotation that are less than 360 degrees.
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